Re: problems with SELECT query results

Hello,

I took your advice into consideration and checked the table. There are
no NULLs in any of the fields that are in my SELECT statement.

Any other suggestions?

Brian Hurt wrote:
> Joshua wrote:
>
>> Hello,
>>
>> I am new to this list and have been working with PostgreSQL since
>> January.
>>
>> Here is my problem, I hope someone here has some experience or can
>> point me in the right direction. I am writing the following query for
>> a C# program I am writing:
>>
>> SELECT 'PV.LINEITEM:' || partnum || ',' || round(onhand) || ',' ||
>> round(qm5) || ',' || round(lsm4) || ',' || ',' || ',' ||
>> round(onorder) || ',' || ',' || ',' || binone || ',' || ',' ||
>> round(backorderqty) || ',' || ',' || round(onhold) || ',' || ',' ||
>> ',' || ',' || ',' || ',' || ',' || round(qtyperjob) || ',' ||
>> round(ordermax) AS gmrim FROM slparts WHERE vendor LIKE 'CH%'
>>
>> The query does work and I am getting results from the database. There
>> are values for all 'partnum' in the database, however, the query
>> results include blank fields here and there in between the returned
>> records. Why am I receiving blank fields for 'gmrim'???? This
>> absolutely defies logic and I cannot find any rhyme or reason for
>> this problem. I cannot have any blank rows in the query, and again
>> the database is completely populated with values.
>
>
> Check for nulls.  Remember that 'foo' || NULL yeilds NULL, so if one
> of your fields is null, the whole string will be null.
>
> You might also consider doing the select into a temporary table, and
> they copying out the result as a CSV file- which looks to be what
> you're trying to do.  Or, alternatively, just select the rows desired
> and have the client program convert things to CSV.  Note that both of
> these will also handle NULLs correctly.
>
> Brian
>
>
>